On Jun 22, 2013, at 10:19 AM, graf <[email protected]> wrote:
> > > суббота, 22 июня 2013 г., 8:26:58 UTC+3 пользователь werner написал: > On 22/06/2013 01:03, graf wrote: > > sweep - sort of a garbage collector which removes unused versions of > > transaction. There is Database header page information, where you can see > > the the current transaction state, there are two parameters: Oldest > > transaction and Next transaction. The range from Oldest to Next - is the > > versions of transactions. The amount of versions slows down the database > > speed. So SQLAlchemy is looking somewhere this "Oldest transaction" and > > after the database works slowly. > I am no expert but "oldest transaction" in Firebird only gets locked if > a transaction is never released. Are you doing "commit retaining" in > some way - not even sure you can do this via SQLalchemy. > > If you haven't already seen this it might help you find the real cause. > > http://www.ibphoenix.com/resources/documents/general/doc_67 > > Werner > > Thank you all guys. I found an issue - the do_commit and do_rollback methods > (the firebird dialect) use retaining=True by default, and there is no option > to change it. Suppose it is good solution to move this option as firebird > specific options > > def do_rollback(self, dbapi_connection): > # Use the retaining feature, that keeps the transaction going > dbapi_connection.rollback(True) > > def do_commit(self, dbapi_connection): > # Use the retaining feature, that keeps the transaction going > dbapi_connection.commit(True) other users have urged me that this boolean is very necessary. Why does Firebird have to be so ridiculously weird (and why do you all use it?) -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/groups/opt_out.
